Web Forms :: Textbox For Not Showing Values Of String Type?
Apr 27, 2016I have a httpget action in which data is coming from controller to view but textboxfor binding values and immediately cleared off.
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Forms Data Controls :: Conversion From Type 'TextBox' To Type 'String' Is Not Valid?
Sep 6, 2010I have a FormView that allows a user to register for a company event. I want to do a couple of things with this form.
1. I need to write this data to a MS SQL database
2. I need to send an email confirmation of their registration to their email.
I know how to do both of these things, but i am having trouble doing both at the same time.
It would be nice if I could do it in one click, but I coded it into two pages to try to help simplify it.
The first page allows the user to input their information into a formview and when they click the submit button, it places those answers into session variables:
[Code]....
[Code]....
The Second page confirms the users information by taking those session variables and placing them into labels:
[Code]....
[Code]....
However, after I place information into the formview on the first page, it throws up this error:
"Conversion from type 'TextBox' to type 'String' is not valid".
Forms Data Controls :: Want To Get The Values Of Textbox To A String When Enter Values To The Textbox
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But since this i am getting this error saying:
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There seems to be no error in my code.
Forms Data Controls :: ERROR - Conversion From Type DBNull To Type String Is Not Valid?
Jan 13, 2010I have a gridview which I'm trying to get the display of phonenumbers listed in a certain display format; (xxx) xxx-xxxx.If I have the code such as this, it displays the unformatted phone number and (000) 000-0000 for the null items.
[Code]....
Web Forms :: Conversion From Type DBNull To Type String Is Not Valid
Nov 18, 2012I have a web in ASP.NET AND CODE IN VB MY DATABASE IS ACCESS WHICH WAS CREATED INITIALLY AND OLD DATA IS ACCESSED FROM THIS ACCESS DATABASE.
THE PROBLEM IS WHEN THE FIELD IS BLANK THE FOLLOWING ERROR COMES
Conversion from type 'DBNull' to type 'String' is not valid.
MY CODE IS AS UNDER
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnSubmit.Click
Dim PNO As String = inputtxt.Text
Dim connectString As String = "Provider=Microsoft.Jet.OLEDB.4.0;" & _
"Data Source=C:awingAWing.mdb"
Dim con As OleDbConnection = New OleDbConnection(connectString)
con.Open()
Dim qstr As String
qstr = "select * from PersData where PNO='" + inputtxt.Text + "'"
[Code] .....
Forms Data Controls :: No Mapping Exists From Object Type System.String[] To A Known Managed Provider Native Type?
Dec 1, 2010I'm trying to pass email addresses from an array to a stored procedure, then display the results in my gridview. I get the following error:No mapping exists from object type System.String[] to a known managed provider native type.On this line: Dim DR As SqlDataReader = MyCommand.ExecuteReader
[Code]....
How To Retrieve The Two Database Column Values To Textbox As Comma Separated String
Dec 30, 2010If i have two textboxes textbox1 & textbox2 and button1 in my ASP.NET and SQL Server database
Database records are:
ID Date Seats
1 15-Dec-2010 1,2
2 15-Dec-2010 3,4
3 17-Dec-2010 1,2,3,4
I want when i type 15-Dec-2010 in TextBox1 and Click on Button1 then in textbox2 The Output would be retrieve from Database using SELECT query then in TextBox2 the output would be displayed as 1,2,3,4
That the exact i want using SELECT query and VB.NET.
Forms Data Controls :: Unable To Cast Object Of Type 'System.DBNull' To Type 'System.String'.
Oct 1, 2010Basically, what I did is that: I have a table in SQL database and some of data fields allow null. I built Objectdatasource through dataset. When I built update page using dataset. It generate the following error before showing the update page correctly. It seems I have issue to retrieve the null value from the database through using objectdatasource through dataset. Any suggestions?An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code
View 6 RepliesDataSource Controls :: The Given Value Of Type String From The Data Source Cannot Be Converted To Type Datetime
May 19, 2010I have this error "The given value of type String from the data source cannot be converted to type datetime of the specified target column." when I used sqlbulkcopy to do the transaction
Here is my code:
[code]....
MVC :: Unable To Cast Object Of Type 'System.String' To Type' / How To Fix This Error
Mar 24, 2010i am using this code for send data to view
[Code]....
Controller e 'System.Collections.Generic.IEnumerable [Code]....
by this code i am render view
[Code]....
after run the application i got this error
Unable to cast object of type 'System.String' to type 'System.Collections.Generic.IEnumerable`1[BentaAccounting.Models.Repository.AllData]'.
DataSource Controls :: 'Conversion From Type 'DBNull' To Type 'String' Is Not Valid.'
Feb 17, 2010I'm trying to get a value from a database and I'm getting an error, see code below:
[Code]....
I get and error when I'm trying to convert the value out of the stored procedure to the string SNAME. Error is as follows:
'Conversion from type 'DBNull' to type 'String' is not valid.'
and the stored procedure is as follows:
[Code]....
Web Forms :: Unable To Cast Object Of Type 'System.DateTime' To Type 'System.String'
Nov 10, 2010[Code]....
Above is my code. The error I'm get is, Unable to cast object of type 'System.DateTime' to type 'System.String'.
The column "To" and column "Subject" are strings and column "Receive" is DateTime. I can't made any changes in the database, so I need to write some code to handle casting a string to datetime or if statement as a work around.
Web Forms :: Unable To Cast Object Of Type System String To Type System Byte
Feb 20, 2013Unable to cast object of type 'System.String' to type 'System.Byte[]'....
on line #2
private void download(DataTable dt) { Byte[] bytes = (Byte[])dt.Rows[0]["FileData"];
Response.Buffer = true; Response.Charset = "";
MVC :: Getting Error: The Parameter Conversion From Type 'System.String' To Type 'Models.Organization' Failed?
Oct 15, 2010I seem to be having issues with posting forms with DropDownLists. I've looked all over the net and tried various solutions, but none seem to work for me.
I'm getting the following error: The parameter conversion from type 'System.String' to type 'Models.Organization' failed because no type converter can convert between these types.
Here's my ViewModel:
[Code]....
Here's my controller:
[Code]....
The objects are generated by ADO.NET Entity Framework. Organizations is its own object, but also a property of Profile (each user belongs to one organization). Now I understand what the error message is saying, just not sure how else I'm supposed to do this.
ADO.NET :: How To Handle Conversion From Type DBNull To Type String Is Not Valid
Oct 5, 2010Conversion from type 'DBNull' to type 'String' is not valid
Dim OledbString As String = ("SELECT Product_Hierarchy,Model,Origin,Item_Code,Description,Price_USD FROM [sheet1$]")
'Dim eAdapter As New SqlDataAdapter(sqlString, connection)
Dim eAdapter As New OleDbDataAdapter(OledbString, connection)
Dim eTable As New DataTable()
eAdapter.Fill(eTable)
Dim i As Integer = 0
[code]...
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Jan 5, 2010Unable to cast object of type 'System.Web.UI.LiteralControl' to type 'System.Web.UI.WebControls.TextBox'.
[code]....
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dim country as string = Dim country As String = e.NewValues("country_name").ToString.Replace(" ", "")
It's updating record correctly. for example if I update USA to USA 1 1 then it's updating like as it. But I want it to be USA11
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Apr 9, 2010I have a .txt file named: myTextFile.txt on my hostingaccount that contains this string: "Hello"
Now my hostingprovider says this: "Any file that you can access via your domain can be accessed through a Secure Socket Layer (SSL) connection as well."
When I type this manually in the address field, my browser will show the string: "Hello" in the top left corner: [URL]
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View 1 RepliesDatabases :: Retrieving From OdbcDataReader / Unable To Cast Object Of Type 'System.Byte[]' To Type 'System.String'
Feb 16, 2010I have defined an ODBC Command and ODBCdatareader as follows
OdbcConnection myConnection = new OdbcConnection(connectionString);
OdbcCommand myCommand = new OdbcCommand();
myCommand.Connection = myConnection;
myCommand.CommandText = "select UOPGM from GREG.TUSROPTF";
OdbcDataReader myReader;
myConnection.Open();
myReader = myCommand.ExecuteReader();
When I try to retreive from the reader as follows:
while (myReader.Read())
{
string someString = myReader["UOPGM"];
lstNames.Items.Add(someString);
}
I get the following error
Error reading the database. Unable to cast object of type 'System.Byte[]' to type 'System.String'."
I have also tried string someString = (string)myReader["UOPGM"]; to no avail
Web Forms :: TextBox Not Showing Message
Mar 19, 2011When I m click on button then CSV file create successfully but textbox1 not show message why , help me.
protected void Button1_Click(object sender, EventArgs e)
{
Response.Buffer = true;[code]...........
Databases :: Catching NULL Values Error "Cannot Cast DBNull.Value To Type 'System.Double'. Please Use A Nullable Type"
Apr 21, 2010I am LINQ querrying against a datatable. However, I am unsuccessfull with catching null values. Here is my code that is giving me the following error.
[Code]....
I am checking to see if minperc is null. However to check that it still is trying to convert the value to double. Cant figure out a way around it. Here is the error: Cannot cast DBNull.Value to type 'System.Double'. Please use a nullable type.
